Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1624918 | Journal of Alloys and Compounds | 2008 | 5 Pages |
Abstract
In this paper, the effects of Ti/(Cr + Fe) ratio, Cr/Fe ratio, Ti/Cr ratio, lattice parameter and e/a value on hydrogen storage properties of 30V-Ti-Cr-Fe alloys have been researched. Ti/(Cr + Fe) ratio, Cr/Fe ratio and Ti/Cr ratio have great influences on the hydrogen absorption and desorption capacities and plateau pressures in the desorption process, and the influences can be attributed to the effects of lattice parameter and e/a value in a great part. Lattice parameter (a) is the main factor which decides the hydrogen absorption and desorption capacities. When a < 3.03 Ã
, hydrogen absorption capacity increases with the increase of a, and it trends stably when a grows further. Hydrogen desorption capacity increases first and then decreases with the increase of a, and it reaches its maximum when a = 3.035 Ã
. A critical e/a value of 5.25 was found in 30V-Ti-Cr-Fe system. When e/a < 5.25, the alloys have high absorption capacities which decrease rapidly when e/a > 5.25. V30Ti32Cr31.91Fe6.09 alloy with high capacity was developed, which absorbs 3.78 wt.%H and desorbs 2.26 wt.%H at 298 K.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Yigang Yan, Yungui Chen, Xiaoxiao Zhou, Hao Liang, Chaoling Wu, Mingda Tao,